Assessment of Air Pollutants and Greenhouse Gases Emission Over East Asia : A Bottom-up Inventory Perspective

Air pollutants (SLCPs) such as tropospheric ozone and aerosols are mainly affected by meteorological variables and emissions. East Asia is one of important source regions of both anthropogenic and natural air pollutants and GHGs. Therefore, significant environmental changes are expected in the future and air quality modeling is the important methodology to quantitatively evaluate them. Multiple emission inventories with various spatio-temporal resolutions are necessary in support of many different air quality modeling and future climate chage researches. Many emission inventories have been developed for Asia and for Globe, such as TRACE-P, INTEX, REAS, CREATE, MICS-Asia, HTAP, SRES, RCP. Those inventories have been successfully used for many international researches, but also have several limitations including relatively old base year, limited number of pollutants/types, and low transparency of sector/fuel information. Understanding discrepancies and similarities among those intentories would give us a better insights to understand not only present status regional emissions amounts but structures of society and policy that link to the future emissions. To understand these, we; 1) selected several base-year bottom-up anthropogenic emission inventories over East Asia, 2) inter-compare emission inventories with more comprehensive sector/fuel classification, 3) explorer emissions change with more updated acvities, emission factors, and control options. The tentative results show that more than 50% of emission amount could be differ by inventory selection and more than 30% of emissions could be changed by emissions factor and/or control options. More findings regarding to these objectives will be presented on site